eb4a76ca7812f0ea21522020deddb860643342372d378c6cbcb78d1b4618d0d2

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 08:44

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General

Target

2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe
Size

109KB
MD5

a968bdc3832a455255d7408206d9a258
SHA1

511c88df45002bd4b75faf1a41d39bcc16015b05
SHA256

eb4a76ca7812f0ea21522020deddb860643342372d378c6cbcb78d1b4618d0d2
SHA512

f100f6c243fb0b4937f0fab2327ded0fdc4e9c3e1a2f149fdf043c61472f70a17ca783b498d48ba9ed49d528cd456836a5ef6c9c96d81a25789a293b59ecef50
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgEne9:1nK6a+qdOOtEvwDpjy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2176-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/2176-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3584-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2176-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_set1
behavioral2/memory/2176-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3584-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2176-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/2176-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3584-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3584	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2176-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000400000001e980-13.dat	upx
behavioral2/memory/2176-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3584-26-0x0000000000500000-0x000000000050F311-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 3584	2176	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	89
PID 2176 wrote to memory of 3584	2176	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	89
PID 2176 wrote to memory of 3584	2176	2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_a968bdc3832a455255d7408206d9a258_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
109KB

MD5
d35675ecb2704a55de42f351b139fc22

SHA1
baec909fc5e342708b9bda83ef5452630e483cac

SHA256
c3aecd255d92c53ab75a9245eca19e45b8de07528b1755697c86f00cd9c0825d

SHA512
31273ac19f735da3cd2f75eff021115d420c0a2a9125cc7f011319ac5d9bdb08a30fc8e5f80f4aaccf858311c1c06617c6e10eaf3b6708283ed7ca696d0b3ff2

Download Submit
memory/2176-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2176-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2176-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2176-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2176-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3584-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3584-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3584-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download